Usage

This Java applet calculates the kinematics for selected A1 reactions.
Your browser must be able to interpret Java applets, we've tested
this program with Netscape 2.02.
You might have to enable the Java option ("Security Preferences" for Netscape)
first.

If you see the picture, you can start to define your kinematics. You
can choose a value for

E0

the initial electron beam energy

[MeV]

q²

the photon fourmomentum transfer

[GeV²/c²]

W

the total center of mass energy

[MeV]

θCMS

the center of mass in plane production angle

[°]

with the scrollbars. For production via an intermediate state you can also
choose

MassX

the mass of the intermediate state

[MeV/c²]

θdecay

the decay angle in the rest system of X,
in respect to the direction of X

[°].

A red window indicates an error, e.g. production below threshold or
negativ electron energy etc. Watch the status line for more information.

Some Reactions

H(e,e'p)π0

We investigate threshold π0 production as tests of chiral perturbation
theory.

With polarized beam and proton polarimeter, this reaction is also
well suited to investigate the N->Δ transition (Nucleon deformation).